/*
 * Copyright 2019 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.samples.apps.iosched.shared.domain.users

import com.google.samples.apps.iosched.model.SessionId
import com.google.samples.apps.iosched.model.userdata.UserEvent
import com.google.samples.apps.iosched.shared.data.feedback.FeedbackEndpoint
import com.google.samples.apps.iosched.shared.data.userevent.SessionAndUserEventRepository
import com.google.samples.apps.iosched.shared.domain.MediatorUseCase
import com.google.samples.apps.iosched.shared.result.Result
import javax.inject.Inject

open class FeedbackUseCase @Inject constructor(
    private val endpoint: FeedbackEndpoint,
    private val repository: SessionAndUserEventRepository
) : MediatorUseCase<FeedbackParameter, Unit>() {

    override fun execute(parameters: FeedbackParameter) {
        var tasks = 2
        val taskDone = {
            tasks -= 1
            if (tasks <= 0) {
                result.postValue(Result.Success(Unit))
            }
        }
        result.addSource(endpoint.sendFeedback(parameters.sessionId, parameters.responses)) {
            taskDone()
        }
        result.addSource(repository.recordFeedbackSent(parameters.userId, parameters.userEvent)) {
            taskDone()
        }
    }
}

data class FeedbackParameter(
    val userId: String,
    val userEvent: UserEvent,
    val sessionId: SessionId,
    val responses: Map<String, Int>
)
